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feat(obf): mom new encryption system dropped
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10,567 changes: 10,567 additions & 0 deletions
10,567
dev.skidfuscator.obfuscator/skidfuscator.log.1
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120 changes: 120 additions & 0 deletions
120
.../src/main/java/dev/skidfuscator/obfuscator/transform/impl/string/StringTransformerV2.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| package dev.skidfuscator.obfuscator.transform.impl.string; | ||
|
|
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| import dev.skidfuscator.obfuscator.Skidfuscator; | ||
| import dev.skidfuscator.obfuscator.event.annotation.Listen; | ||
| import dev.skidfuscator.obfuscator.event.impl.transform.method.RunMethodTransformEvent; | ||
| import dev.skidfuscator.obfuscator.event.impl.transform.skid.PostSkidTransformEvent; | ||
| import dev.skidfuscator.obfuscator.skidasm.SkidClassNode; | ||
| import dev.skidfuscator.obfuscator.skidasm.SkidMethodNode; | ||
| import dev.skidfuscator.obfuscator.skidasm.cfg.SkidBlock; | ||
| import dev.skidfuscator.obfuscator.skidasm.expr.SkidConstantExpr; | ||
| import dev.skidfuscator.obfuscator.transform.AbstractTransformer; | ||
| import dev.skidfuscator.obfuscator.transform.Transformer; | ||
| import dev.skidfuscator.obfuscator.transform.impl.string.generator.EncryptionGeneratorV3; | ||
| import dev.skidfuscator.obfuscator.transform.impl.string.generator.v3.ByteBufferClinitV3EncryptionGenerator; | ||
| import dev.skidfuscator.obfuscator.transform.impl.string.generator.v3.BytesClinitV3EncryptionGenerator; | ||
| import dev.skidfuscator.obfuscator.util.RandomUtil; | ||
| import org.mapleir.asm.ClassNode; | ||
| import org.mapleir.ir.cfg.ControlFlowGraph; | ||
| import org.mapleir.ir.code.CodeUnit; | ||
| import org.mapleir.ir.code.Expr; | ||
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| import java.util.*; | ||
| import java.util.stream.Collectors; | ||
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| public class StringTransformerV2 extends AbstractTransformer { | ||
| private final Map<SkidClassNode, EncryptionGeneratorV3> keyMap = new HashMap<>(); | ||
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| private final Set<String> INJECTED = new HashSet<>(); | ||
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| public StringTransformerV2(Skidfuscator skidfuscator) { | ||
| this(skidfuscator, Collections.emptyList()); | ||
| } | ||
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| public StringTransformerV2(Skidfuscator skidfuscator, List<Transformer> children) { | ||
| super(skidfuscator, "String Encryption", children); | ||
| } | ||
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| @Listen | ||
| void handle(final RunMethodTransformEvent event) { | ||
| final SkidMethodNode methodNode = event.getMethodNode(); | ||
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| if (methodNode.isAbstract() | ||
| || methodNode.isInit()) { | ||
| this.skip(); | ||
| return; | ||
| } | ||
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| if (methodNode.node.instructions.size() > 10000) { | ||
| this.fail(); | ||
| return; | ||
| } | ||
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| final ControlFlowGraph cfg = methodNode.getCfg(); | ||
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| if (cfg == null) { | ||
| this.fail(); | ||
| return; | ||
| } | ||
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| final SkidClassNode parentNode = methodNode.getParent(); | ||
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| EncryptionGeneratorV3 generator = keyMap.get(parentNode); | ||
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| if (generator == null) { | ||
| switch (RandomUtil.nextInt(1)) { | ||
| default: { | ||
| final int size = RandomUtil.nextInt(127) + 1; | ||
| final byte[] keys = new byte[size]; | ||
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| for (int i = 0; i < size; i++) { | ||
| keys[i] = (byte) (RandomUtil.nextInt(127) + 1); | ||
| } | ||
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| keyMap.put(parentNode, (generator = new ByteBufferClinitV3EncryptionGenerator())); | ||
| break; | ||
| } | ||
| } | ||
| } | ||
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| if (!INJECTED.contains(parentNode.getName())) { | ||
| generator.visitPre((SkidClassNode) methodNode.owner); | ||
| INJECTED.add(parentNode.getName()); | ||
| } | ||
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| EncryptionGeneratorV3 finalGenerator = generator; | ||
| cfg.allExprStream() | ||
| /* | ||
| * | ||
| */ | ||
| .filter(SkidConstantExpr.class::isInstance) | ||
| .map(SkidConstantExpr.class::cast) | ||
| .filter(e -> !e.isExempt()) | ||
| .filter(constantExpr -> constantExpr.getConstant() instanceof String) | ||
| /* | ||
| * We collect since we're modifying the expression stream | ||
| * we kinda need to just not cause any concurrency issue. | ||
| * ¯\_(ツ)_/¯ | ||
| */ | ||
| .collect(Collectors.toList()) | ||
| .forEach(unit -> { | ||
| final CodeUnit parent = unit.getParent(); | ||
| final String constant = (String) unit.getConstant(); | ||
| final SkidBlock block = (SkidBlock) unit.getBlock(); | ||
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| final Expr encrypted = finalGenerator.encrypt(constant, methodNode, block); | ||
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| try { | ||
| parent.overwrite(unit, encrypted); | ||
| } catch (IllegalStateException e) { | ||
| return; | ||
| } | ||
| }); | ||
| this.success(); | ||
| } | ||
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| @Listen | ||
| void handle(final PostSkidTransformEvent event) { | ||
| keyMap.forEach((clazz, generator) -> generator.visitPost(clazz)); | ||
| } | ||
| } |
88 changes: 88 additions & 0 deletions
88
...va/dev/skidfuscator/obfuscator/transform/impl/string/generator/EncryptionGeneratorV3.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package dev.skidfuscator.obfuscator.transform.impl.string.generator; | ||
|
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| import dev.skidfuscator.obfuscator.skidasm.SkidClassNode; | ||
| import dev.skidfuscator.obfuscator.skidasm.SkidMethodNode; | ||
| import dev.skidfuscator.obfuscator.skidasm.cfg.SkidBlock; | ||
| import org.mapleir.ir.code.Expr; | ||
|
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| import java.lang.annotation.ElementType; | ||
| import java.lang.annotation.Retention; | ||
| import java.lang.annotation.RetentionPolicy; | ||
| import java.lang.annotation.Target; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
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| public interface EncryptionGeneratorV3 { | ||
| Expr encrypt(String input, final SkidMethodNode node, final SkidBlock block); | ||
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| String decrypt(DecryptorDictionary input, int key); | ||
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| void visitPre(final SkidClassNode node); | ||
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| default void visitPost(final SkidClassNode node) {}; | ||
|
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| @Retention(RetentionPolicy.RUNTIME) | ||
| @Target(ElementType.METHOD) | ||
| @interface InjectMethod { | ||
| // empty | ||
| String value(); | ||
| InjectMethodTag[] tags() default {}; | ||
| } | ||
|
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| enum InjectMethodTag { | ||
| RANDOM_NAME | ||
| } | ||
|
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| @Retention(RetentionPolicy.RUNTIME) | ||
| @Target(ElementType.FIELD) | ||
| @interface InjectField { | ||
| // empty | ||
| String value(); | ||
| InjectFieldTag[] tags() default {}; | ||
| } | ||
|
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| enum InjectFieldTag { | ||
| RANDOM_NAME, | ||
| FINAL, | ||
| NO_INTERFACE_COMPAT | ||
| } | ||
|
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| class DecryptorDictionary { | ||
| private final Map<String, DecryptorItem<?>> items; | ||
|
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| public DecryptorDictionary(Map<String, DecryptorItem<?>> items) { | ||
| this.items = items; | ||
| } | ||
|
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| public <T> T get(String key) { | ||
| return (T) items.get(key).getKey(); | ||
| } | ||
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| public DecryptorDictionary of(String key, Object value) { | ||
| items.put(key, new DecryptorItem<>(key, value)); | ||
| return this; | ||
| } | ||
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| public static DecryptorDictionary create() { | ||
| return new DecryptorDictionary(new HashMap<>()); | ||
| } | ||
| } | ||
|
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| class DecryptorItem<T> { | ||
| private final String key; | ||
| private final T value; | ||
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| public DecryptorItem(String key, T value) { | ||
| this.key = key; | ||
| this.value = value; | ||
| } | ||
|
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| public String getKey() { | ||
| return key; | ||
| } | ||
|
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| public T getValue() { | ||
| return value; | ||
| } | ||
| } | ||
| } |
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